Implement wav2vec2 as an audio encoder model. (#9549)

This is useless on its own but there are multiple models that use it.

comfy_extras/nodes_audio_encoder.py

@@ -0,0 +1,44 @@
+import folder_paths
+import comfy.audio_encoders.audio_encoders
+import comfy.utils
+
+
+class AudioEncoderLoader:
+    @classmethod
+    def INPUT_TYPES(s):
+        return {"required": { "audio_encoder_name": (folder_paths.get_filename_list("audio_encoders"), ),
+                             }}
+    RETURN_TYPES = ("AUDIO_ENCODER",)
+    FUNCTION = "load_model"
+
+    CATEGORY = "loaders"
+
+    def load_model(self, audio_encoder_name):
+        audio_encoder_name = folder_paths.get_full_path_or_raise("audio_encoders", audio_encoder_name)
+        sd = comfy.utils.load_torch_file(audio_encoder_name, safe_load=True)
+        audio_encoder = comfy.audio_encoders.audio_encoders.load_audio_encoder_from_sd(sd)
+        if audio_encoder is None:
+            raise RuntimeError("ERROR: audio encoder file is invalid and does not contain a valid model.")
+        return (audio_encoder,)
+
+
+class AudioEncoderEncode:
+    @classmethod
+    def INPUT_TYPES(s):
+        return {"required": { "audio_encoder": ("AUDIO_ENCODER",),
+                              "audio": ("AUDIO",),
+                             }}
+    RETURN_TYPES = ("AUDIO_ENCODER_OUTPUT",)
+    FUNCTION = "encode"
+
+    CATEGORY = "conditioning"
+
+    def encode(self, audio_encoder, audio):
+        output = audio_encoder.encode_audio(audio["waveform"], audio["sample_rate"])
+        return (output,)
+
+
+NODE_CLASS_MAPPINGS = {
+    "AudioEncoderLoader": AudioEncoderLoader,
+    "AudioEncoderEncode": AudioEncoderEncode,
+}